Redzen.IO.MemoryBlockStream.ReadInner C# (CSharp) Method

        private int ReadInner(byte[] buff, int offset, int count, int blockIdx, int blockOffset)
        {
            // Determine how many bytes will be read (based on requested bytes versus the number available).
            int readCount = Math.Min(count, _length - _position);
            if(0 == readCount) {
                return 0;
            }

            int remaining = readCount;
            int tgtOffset = offset;
            int blkIdx = blockIdx;
            int blkOffset = blockOffset;

            for(;;)
            {
                // Get handle on target block.
                byte[] blk = _blockList[blkIdx];

                // Determine how many bytes to write into this block.
                int copyCount = Math.Min(_blockSize - blkOffset, remaining);

                // Write bytes into the buffer.
                Array.Copy(blk, blkOffset, buff, tgtOffset, copyCount);

                // Test for completion.
                remaining -= copyCount;
                if(0 == remaining)
                {   // All bytes have been copied.
                    break;
                }

                // Update state.
                tgtOffset += copyCount;
                blkIdx++;
                blkOffset++;
                blkOffset = 0;
            }

            _position += readCount;
            return readCount;
        }